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BizzPhizz
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Homework Statement
Question 1: A violin is tuned indoors to play the proper frequencies. A musician then uses the violin to play outdoors where the temperature is considerably colder. Wil the violin play too sharp (high) or too flat (low)? Ignore temperature effects on length and density
The Attempt at a Solution
The frequency and wavelength are proportional to velocity in air. This means that velocity if speed in air decreases, then both wavelength and frequency would decrease. Since there is a temperature drop outside the speed of sound in air would decrease and thus ultimately cause wavelength and frequency of a wave traveling in air to decrease.
Since frequency is directly related to pitch, you would be hearing the violin play a flatter sound than if it was indoors because the frequency at which it plays outdoors would decrease.
Homework Statement
Question 2: An organ pipe plays a certain fundamental frequency when the pipe is open at both ends. If one end of the pipe is covered, what happens to the pitch of the note emitted?
The Attempt at a Solution
The condition for a fundamental frequency to be played in an open air column is that half the wavelength is equal to the length of the pipe. When you cover one end the pipe still stays the same length but the conditions change. You would not here any resonance because the node forms at both the open and closed ends of the air column since the air column is twice the size of the closed ended air columns fundamental frequency condition (l=/4)